if 5 > 2:
    print("5 is greater than 2")
    print("222222")
else:
    print("5 is not greater than 12")


age = 30
if age < 18:
    print("You are underaged")
elif age >= 18 and age < 30:
    print("You are young")
elif age >= 30 and age <50:
    print("You are middle-aged")
else:
    print("You are old")
    #判断闰年
year=int(input("请输入年份："))
if (year % 4 == 0 and year% 100 != 0) or (year % 400 == 0):
     print("%d是闰年" % year)
else:
    print("%d不是闰年" % year)

#ctrl+d 复制一行
#Ctrl+alt+l格式化代码
#Ctrl+/注释


#a b c 比较大小
a = int(input("请输入a:"))
b = int(input("请输入b:"))
c = int(input("请输入c:"))
if a > b:
    if a > c:
        print("a is the largest")
    else:
        print("c is the largest")
else:
    if b > c:
        print("b is the largest")
    else:
        print("c is the largest")


#计算器实现加减乘除
num1 = float(input("请输入第一个数字："))
num2 = float(input("请输入第二个数字："))
op = input("请输入运算符：")
if op == "+":
    print(num1 + num2)
elif op == "-":
    print(num1 - num2)
elif op == "*":
    print(num1 * num2)
elif op == "/":
    print(num1 / num2)
else:
    print("输入错误")
